Rizvi requested Rini ____ telephone to attend the meeting.

শূন্যস্থানে সঠিক উত্তর by, কারণ telephone শব্দের আগে by বসে।
Complete sentence: Rizvi requested Rini by telephone to attend the meeting.

মনে রাখুন:

• By phone: The manager will give instructions by phone.
• Over the phone: Nasima will discuss the issue with Mehedi over the phone.
• On the phone: She has spent hours on the phone in recent weeks, talking to negotiators in a labor dispute.